js写的替换字符串（相当于js操作字符串的一个练习）

1.达到的效果

　　1./main_1.do,/left_1.do -> main:1,left:1
　　2./tbl_type/v_list_{id}.do -> tbl_type:list:{id}
　　3./tmd/v_list.do -> tmd:list

2.代码

/*
* 修改菜单URI自动设置权限URI
*/
function autoSetMenuPermission() {
var permission = document.getElementsByName("menuPermission")[0];
var menuUri = document.getElementsByName("menuUri")[0].value;
var perUri;
if (menuUri.indexOf(",") != -1) {
var uriArr = menuUri.split(",");
var perUriArr = new Array();
for (x in uriArr) {
perUriArr.push(removeUnderLine(uriArr[x]));
}
perUri = perUriArr.toString();
} else {
perUri = removeUnderLine(menuUri);
}
permission.value = perUri;
}
/*
* 1./main_1.do,/left_1.do    main:1
* 2./tbl_type/v_list_{id}.do tbl_type:list:{id}
* 3./tmd/v_list.do tmd:list
*/
function removeUnderLine(str) {
str = str.replace(".do","").replace("/","");
var index_backslash = str.indexOf("/");
if (index_backslash != -1) {
var arry = str.split("/");
var name = arry[0];
var oper = arry[1];
//        alert(oper);
if (oper.indexOf("_")!=-1) {
var operArr = oper.split("_");
switch (operArr.length) {
case 2:
//                aa = oper.replace("_",":");
prefix = oper.substr(0,1);
//                alert(prefix);
endfix = oper.substr(oper.indexOf("_")+1);
if (prefix == "o") {
if (endfix == 'add') {
endfix = 'save';
}else if(endfix == 'edit'){
endfix = 'update';
}
}
return name+":"+endfix;
break;
case 3:
if (operArr[2] == 'order') {
aa = oper.substr(oper.indexOf("_")+1);
} else {
aa = oper.substr(oper.indexOf("_")+1).replace("_",":");
}
//                alert(aa);
return name+":"+aa;
break;
default:
break;
}
}else{
return name+":"+oper;
}

} else {
var index = str.indexOf("_");
if (index != -1) {
if (isNaN(str.substr(index + 1))) {
return str.substr(index + 1);
} else {
return str.replace("_",":");
}
} else {
return str;
}
}
}